SHOCKING CLAIM ANGELINA FEARED: IT'S NOT BRAD'S BABY

Angelina Jolie has been struggling with the most explosive Hollywood secret ever — Brad Pitt may not be the father of her newborn daughter Shiloh, a source tells The ENQUIRER!

The Oscar-winning beauty told pals that she slept with another man before getting pregnant, says the insider, and that's when she confided her fear about baby Shiloh's paternity.

The ENQUIRER has cracked the wall of security surrounding the clan to uncover the astonishing story.

In a stunning world exclusive interview, the insider also reveals the actress has been petrified Brad will leave her if the baby is not his — and she's desperate to keep him away from his ex-wife Jennifer Aniston.

"Angelina is thrilled about Shiloh's arrival, but deep down she was terrified Brad wasn't the baby's father and that he'd find out, dump her and the kids and go back to Jennifer," the insider told The ENQUIRER.